Raspberry Pi Zero 2 W • Hacker News Board

Re: Raspberry Pi Zero 2 W

#91

Post by jiggunjer » Fri, Oct 29, 2021, 2:20 AM UTC

vletal wrote: post #18

One thing which I miss on RPis, especially these tiny ones, is a tty exposed via the charging USB.

I'm not sure how that works? you connect the pi to your laptop and use putty to login?

This would also require one of those tty-to-usb cables?

Re: Raspberry Pi Zero 2 W

#92

Post by HeyLaughingBoy » Fri, Oct 29, 2021, 8:54 PM UTC

jiggunjer wrote: post #91

vletal wrote: post #18

One thing which I miss on RPis, especially these tiny ones, is a tty exposed via the charging USB.

I'm not sure how that works? you connect the pi to your laptop and use putty to login? This would also require one of those tty-to-usb cables?

No, just a regular USB cable. USB's CDC protocol makes it look like a serial port to the host PC.

Re: Raspberry Pi Zero 2 W

#93

Post by Already__Taken » Sat, Oct 30, 2021, 12:59 AM UTC

alexellisuk wrote: post #19

I've been running one of these for a few months too and was excited when I saw an ARMv7 CPU. In the open source and container world, many projects have stopped supporting the Zero and RPi1 due to its lack of RAM and slow CPU speed. Even running "go build" can take multiple seconds on a simple program. Starting Node.js was also fairly slow. The RPi zero shines for Python scripts that access hardware - for sensors and…

found the same experience last night, k3s to heavy but I have faasd going now. just have to figure what to do with it now

Re: Raspberry Pi Zero 2 W

#94

Post by luegen » Sat, Oct 30, 2021, 3:02 PM UTC

cwiggs wrote: post #87

luegen wrote: post #74

Surprised nobody has mentioned or compared it to the Radxa Zero.[0][1] Spec of the Radxa Zero ($15): CPU: Quad Cortex-A53 1.8 GHz, 12nm process GPU: Mali G31 MP2 RAM: LPDDR4 512MB/1GB/2GB/4GB Storage: eMMC 5.1 8/16/32/64/128GB and uSD card HDMI: Micro HDMI, HDMI 2.1, 4K@60 HDR Multimedia: H265/VP9 decode 4Kx2K@60 Wireless: WiFi4/BT4 or WiFi5/BT5 USB: One USB 2.0 Type C OTG, one USB 3.0 Type C host GPIO: 40Pin GPIO, A…

That's an interesting setup, I'd love to hear more. Do you have a wifi antenna hooked up to the pi?

As client radio I use a cheap rtl8812au-based single-antenna Wi-Fi USB stick by Piaek with a ALFA APA-M05 7dBi antenna, and as access point I use the on-board radio of the RPi in master mode. I use iptables to set up NAT (masquerading), optionally via an OpenVPN tunnel. It can be an odyssey finding a cheap Wi-Fi stick for which there are good drivers available (Amazon reviews and answers do help), let alone one that can be run in master mode, and you often have to compile the drivers yourself, in my case (Arch Linux ARM) I need to pull the dkms package from AUR, change the PKGBUILD to build for Pi and it builds awfully slowly (around 1 hour).

As for long-range antennas, you can check out Yagi's or Cantenna, also very nice DIY projects. The longest range can be achieved by dishes. Though check your countries dBi limit that is allowed to be emitted in any direction and then reduce your tx power to stay below that. The directivity will still help reducing interference from other directions. I like the APA-M05 for its compactness.

For the cooling, I use DHT22s and simply run a bunch of fans via a PWM-driven MOSFET, directly from the Pi, roughly following the video: https://www.youtube.com/watch?v=oJ32CMxliCQ

I send notifications (actually, not SMS) via qpush.me.

Re: Raspberry Pi Zero 2 W

#95

Post by boondaburrah » Mon, Nov 01, 2021, 4:48 PM UTC

rbanffy wrote: post #55

boondaburrah wrote: post #49

Earlier quoted context omitted.

Shoving 128kb into my 6502 build right now like "that oughta do it"

There isn’t much 6502 software that can use more than that. My //e had (technically still has) 320K. Most of the time, it was a ramdisk.

Sure, but I'm the one writing software for this computer and I do /not/ trust myself to be efficient.

Of course I haven't tried banking in anything over 48KB yet so I don't even know if my circuit works, but it boots!